pcm_simple.c File Reference

PCM Simple Interface. More...

Functions
int	snd_spcm_init (snd_pcm_t *pcm, unsigned int rate, unsigned int channels, snd_pcm_format_t format, snd_pcm_subformat_t subformat, snd_spcm_latency_t latency, snd_pcm_access_t access, snd_spcm_xrun_type_t xrun_type)
	Set up a simple PCM.
int	snd_spcm_init_duplex (snd_pcm_t *playback_pcm, snd_pcm_t *capture_pcm, unsigned int rate, unsigned int channels, snd_pcm_format_t format, snd_pcm_subformat_t subformat, snd_spcm_latency_t latency, snd_pcm_access_t access, snd_spcm_xrun_type_t xrun_type, snd_spcm_duplex_type_t duplex_type)
	Initialize simple PCMs in the duplex mode.
int	snd_spcm_init_get_params (snd_pcm_t *pcm, unsigned int *rate, snd_pcm_uframes_t *buffer_size, snd_pcm_uframes_t *period_size)
	Get the set up of simple PCM.

Detailed Description

PCM Simple Interface.

Author

Jaroslav Kysela perex.nosp@m.@per.nosp@m.ex.cz

Date

2004

Function Documentation

snd_spcm_init()

int snd_spcm_init	(	snd_pcm_t *	pcm,
		unsigned int	rate,
		unsigned int	channels,
		snd_pcm_format_t	format,
		snd_pcm_subformat_t	subformat,
		snd_spcm_latency_t	latency,
		snd_pcm_access_t	access,
		snd_spcm_xrun_type_t	xrun_type )

Set up a simple PCM.

Parameters

pcm	PCM handle
rate	Sample rate
channels	Number of channels
format	PCM format
subformat	PCM subformat
latency	Latency type
access	PCM acceess type
xrun_type	XRUN type

Returns

0 if successful, or a negative error code

Warning

The simple PCM API may be broken in the current release.

snd_spcm_init_duplex()

int snd_spcm_init_duplex	(	snd_pcm_t *	playback_pcm,
		snd_pcm_t *	capture_pcm,
		unsigned int	rate,
		unsigned int	channels,
		snd_pcm_format_t	format,
		snd_pcm_subformat_t	subformat,
		snd_spcm_latency_t	latency,
		snd_pcm_access_t	access,
		snd_spcm_xrun_type_t	xrun_type,
		snd_spcm_duplex_type_t	duplex_type )

Initialize simple PCMs in the duplex mode.

Parameters

playback_pcm	PCM handle for playback
capture_pcm	PCM handle for capture
rate	Sample rate
channels	Number of channels
format	PCM format
subformat	PCM subformat
latency	Latency type
access	PCM acceess type
xrun_type	XRUN type
duplex_type	Duplex mode

Returns

0 if successful, or a negative error code

Warning

The simple PCM API may be broken in the current release.

snd_spcm_init_get_params()

int snd_spcm_init_get_params	(	snd_pcm_t *	pcm,
		unsigned int *	rate,
		snd_pcm_uframes_t *	buffer_size,
		snd_pcm_uframes_t *	period_size )

Get the set up of simple PCM.

Parameters

pcm	PCM handle
rate	Pointer to store the current sample rate
buffer_size	Pointer to store the current buffer size
period_size	Pointer to store the current period size

Returns

0 if successful, or a negative error code

Warning

The simple PCM API may be broken in the current release.